FSCTL_QUERY_STORAGE_CLASSES IOCTL (winioctl.h)

Retrieves the storage tiers defined for a volume that supports data tiering.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
 (HANDLE) hDevice, // handle to device
 FSCTL_QUERY_STORAGE_CLASSES, // dwIoControlCode
 (LPDWORD) lpInBuffer, // input buffer
 (DWORD) nInBufferSize, // size of input buffer
 (LPDWORD) lpOutBuffer, // output buffer
 (DWORD) nOutBufferSize, // size of output buffer
 (LPDWORD) lpBytesReturned, // number of bytes returned
 (LPOVERLAPPED) lpOverlapped // OVERLAPPED structure
);

Requirements

See also

• DeviceIoControl